Power driven hair cutting device



sept. s, 1931. v. G. APPLE 1,822,262

P OWER DRIVEN HAIR CUTTING DEVICE Filed June 14. 1928 F /g.l F5. 2. a

1N VEN TO/e Patented Sept. 8, 1931 UNITED STATES VINCENT G. .AEIPLE OF VIZLAIY'CLON, OHIO POWER DRIVEN HAIR CUTTING DEVICE Application filed. .Tune 14, 1928.

This invention relates to a cutting device of that type comprising two members or blades, both having cutting teeth, one of said members being movable relative to the other,

and a power driven rotating part so arranged as to reciprocate one of the blades.

In cutting devices of this type it has been customary heretofore to hold the two blades in slidable contact with each other by means of a thumb screw which presses downward upon the reciprocating blade, the thumb screw usually being of such size and in such a position as to obstruct the View of the operator using the device.

One object of my invention is to provide a cutting device of this character which comprises a minimum of parts and which may be quickly disassembled and assembled.

To this end my device is so designed thatV the frame and handle, which are ordinarily made separately, are made of a single moulding, and the reciprocating blade, which ordinarily has attached thereto a separate piece for making contact with the rotating part, is made of a single piece of steel5fand while in other devices of this character it is necessary to remove one or more parts before the reciprocating blade may. be removed for cleaning or'sharpening, in my improved type it is only necessary to relieve the tension screw slightly and the reciprocatingblade may be lifted out.

Further objects of my invention will be l readily apparent, to those skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein:V

Fig. 1 is an end view of the assembled device.

Fig. 2 is a plan view of the assembled dcvice.

Fig. 3 is a detail of the reciprocating blade shown in perspective.

Fig. 4 is a section taken on line 1-1 of Fig. 2.

Fig. 5 is a detail of the stationary blade shown in perspective.

Fig. 6 is a detail of the one piece frame and 50 handle.

Serial No; 285,351.

mounted at its end Va toothed cutting blade 21 whichv is securely fastened by extending screws 22 and 23 through holes 24 and 25 into tapped holes 26 and 27. Securely fastened in the keyway 28 of the cutting blade 21 are 'two keys 29 and 30. Mounted for reciprocatory movement on blade 21 is another blade Blade 31 has a keyway 32 cut through its entire length, which, fitting over keys 29 and 30, serves to keep the two blades in alignment and yet allows a reciprocatory movement of blade 31 over blade 21. Parts of the contacting surfaces of the blades are removed, as at 33 and 34, to lessen the area in frictional engagement. An opening 35 in blade 31 is made to such dimensions as to accurately fit the roller 36. Roller 36 is given an orbicu-I lar movement by crank pin 37 of crank shaft 38, thus accomplishing a reciprocatory movement of blade 31. A clearance cut 39 in blade 21 is necessary to allow a clear path for the roller. Parts of blade 31 are cut away, as at 40 and 41, so as to leave surfaces 42 and 43, which rest upon and accurately fit ledges 44 and 45 of frame 21. This construction allows projections 46 and 47 to engage roller 36, and yet at the same time, the surfaces 42 and 43, resting upon ledges 44V and 45, form an effective seal to keep foreign matter away from the roller and bearings.

The foregoing is important as it obviates the necessity for a lid, which is usually used and which must be removed before the reciprocatory blade can be taken out.

Y Slidably mounted in handle 2() and bored to fit crank shaft 38 is a tubular bearing 48. At the front end, and forming a part of bea1xing 48 is a T shaped projection 49 so located that the surfaces 5()` and 51 rest uponand accurately lit ledges 52 and 53 of the frame, thereby holding the bearing against rotation and at the same time forming a seal to keep foreign matter from the working parts. Back of and pressing against bearing 48 spring 54 is held in suitable compression by hollow screw 55 pressing against ferule 56 and washer 57. The pressure of spring 54 against bearing 48 brings the T shaped end 49 against blade 3l to produce necessary pressure between blades 2l and 3l as required for correct cutting action. Ferule 56 is mounted on and is in effect a vpart-of flexible shaft casing 58, and inasmuch as this ferule is held by spring pressure between washer 57 and hollow screw 55 it forms an effective swivel to allow handle 20 to be turned about flexible shaft casing 58 so that cutting may be done in any position of the blades. On the end of flexible shaft 59 is mounted the conventional terminal 60 which extends into a hole 6l in crank shaft 38, the integral key 62 driving the crank shaft by extending into slot 63.

rllhe simplicity of the operation of removing the blade 3l is apparent as it is only necessary to loosen hollow screw 55 slightly when bearing 48 may be pushed back and the blade removed without removing any other art. p Having described my invention what I claim as new and useful and upon which I desire to obtain Letters Patent is:

l. A .power driven hair cutting device h aving :in combination, a frame, a fixed toothed blade mounted thereon, .a movable toothed blade mounted for reciprocatory movement on the fixed blade, a rotatable shaft for imparting reciprocatory movement to the movable blade, an axiallyshiftable bearing member surrounding the rotatable shaft and having one -end resting against said reciprocatory blade, and tension means adapted to press said axially shiftable bearing member against said reciprocatory blade.

2. A power driven hair cutting device having in combination, aframe, a fixed toothed blade mounted thereon, a movable toothed blade mounted for reciprocatory movement on the fixed blade, .a rotatable shaft for imparting reciprocatory movement to the movable blade, an axially shiftable bearing member surrounding said shaft and making Contact at one end with said movable blade and a spring to press the axially shiftable bearing to cause a resultant pressure between the two said blades.

3. A power driven hair cutting device having in combination, a frame, a fixed toothed blade mounted thereon, a movable toothed blade mounted for reciprocatory movement on the fixed blade, a rotatable shaft for imparting reciprocatory movement to the movable blade, an axially shiftable bearing member surrounding said shaft and making contact at one iend with :said movable bladefmeans for .moving .the axially shiftable bearing member in one direction to hold the reciprocatoiy blade in place and in the other direction to permit its removal.

4. A power driven hair cutting device having in combination, a frame, a fixid toothed blade mounted thereon, a movable toothed blade mounted for reciprocatory movement on the fixed blade, a rotatable shaft for imparting reciprocatory movement to the movable blade, an axially shiftable bearing member surrounding said rotatable shaft and making contact at one end with said movable blade, a flexible shaft for connecting the rotatable shaft to the power means, a fiexible casing surrounding the flexible shaft, ,and a spring pressing in one direction to cause the axially shiftable bearing member to maintain pressure between the blades and in the other direction to cause a frictional restraint to rotation of the flexible casing relative to the frame.

5. A power driven hair cutting device having in combination, a frame, a fixed toothed blade mounted thereon, a movable toothed blade mounted for reciprocatory movement on the fixed blade, al rotatable shaft for imparting reciprocatory movenient to the movable blade, an axially shiftable bearing member surrounding said rotatable shaft, and making contact at one end with said movable blade, a flexible shaft for connecting the rotatable shaft to the power means, a flexible casing surrounding the flexible shaft, a spring pressing in one direction to cause the axially shiftable bearing member to maintain pressure between the blades and in the other direction to cause a frictional rest `aint to rotation of the flexible casing relative to the frame, and a means for releasing the spring tension that the axially shiftable bearing member may be moved so that the movable blade may be detached.

G. A power driven hair cutting device comprising a cylindrical handle having a relatively wide toothed blade attached at its lower edge to lugs on said handle leaving a space of triangular cross section open at the top between said blade and the end of said handle, a reciprocatory toothed blade of triangular' cross section in said space, means movable axially in said cylindrical handle to press said reciprocatory vblade in an axial direction against said fixed blade, and shallow guideways cooperating between said fixed blade and said reciprocatory blade constituting the sole means to hold said reciprocatory blade against its tendency to more upward due to its wedge shape.

7. A power driven hair cutting' device comprisng, a cylindrical handle, having a relatively wide toothed blade attached at its lower edge to lugs on said handle lea-ving a space of triangular cross section open at the top between said blade and the end of said handle, a reciprocatory toothed blade of triangular cross section in said space, an axially movable member in said cylindrical handle adapted to bear against said reciproca- 5 tory blade to urge said blade in an axial direction against said fixed blade, tension means to urge said member axially, a shallow guide on said xed blade coacting with a corresponding guide in said reciprocatory 10 blade constituting the sole means to hold said reciprooatory blade against its tendency to move upward due to its wedge shape and means to withdraw said tension means from said axially movable member t0 permit said u reciprocatory blade to be detached from said guide and moved upwardly out of said wedge shaped space.

8. A power driven hair cutting device comprising, a cylindrical handle having a 20 relatively wide toothed blade attached at its lower edge to lugs on said handle leaving a space of triangular cross section between said blade and the end of said handle, a reciprocatory'toothed blade of triangular cross 25 section in said space7 a shaft extending axially through said handle and having means to reciprocate said reciprocatory blade, a non-rotatable axially movable bearing meinber surrounding said shaft, means to urge 3D said bearing member against said reciprocatory blade to press said reciprocatory blade against said fixed blade, and shallow guide means between the said blades constituting l the sole means for preventing the triangular blade from moving upwardly out of the triangular shaped space.

In testimony whereof I have hereunto set my hand. w VINCENT Gr. APPLE. 

